Plate Tectonics And Continental Drift

------------------------------------------------- eggshell Tectonics and Continental Drift The Earths crust is broken up into huge slabs of rock. These slabs of rock atomic number 18 known as tectonic graduated tables. There argon septette major, and twelve small houses. naval plates ar 5km-10km thick whereas uprightal plates ar bigger at more(prenominal) or less 25-90km in thickness. Basaltic oceanic plates are do from denser rock, than granitic continetal plates. ------------------------------------------------- The Plate Tectonic Theory * The earths crust is shared out into pitchfork parts called tectonic plates. * These plates float on the partially melt rocks of the upper mantle. * The plates live on referable to convection cells in the mantle. * Margins are the areas in the midst of the tectonic plates. Margins of converging plates are called devastating brinks while margins of diverging plates are called constructive margins. Margins where the plates slide against for each one(a) other are called unprogressive margins. * Plates can be oceanic or Continental. When an oceanic plate meets a Continental plate, its careworn beneath the margin of the Continental plate and the rocks of the oceanic plate go into the mantle. When a continental plate meets another continental plate, folding may sink and fold mountains created.

------------------------------------------------- The History of Continental Drift * Continents drift cod to the sweat of the tectonic plates. * Originally, there was one large continent called Pangea surround by a sea called Panthalassa. It is believed Pangea was centered around give in day Africa. ==Tectonic Plates== ------------------------------------------------- Earthquakes An temblor is the result of a abrupt release of energy in the Earths crust that creates unstable waves. force can be released due to a exit of reasons, much(prenominal) as a push/strike-slip fault, or when deuce plates elastically contort as they slide prehistoric one another, mental discount up elastic...If you want to pulsate a full essay, hunting lodge it on our website: Ordercustompaper.com

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